Device for fixing the free thread ends of the spools of embroidery machines



- R. SEYFARTH I DEVICE FOR FIXING THE FREE THREAD ENDS OF THE SPOOLS OFEMBROIDERY MACHINES ru'e F05. v. 1924 l'mren to v:

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Patented Feb, 24-, 192W on To Train FIRM: voornfawn- DIETR-ICZ-I)aKrInnoEsnLL- nnvron non rrrrrne arr-Lin rrrnnsn or sroons or EMBROIDERYraaonrnns.

Application filed February 7, was. Serial in. 691,171.

T 0 all whom it may concern:

Be it known that l, Riot-man Snrmnan, a citizen of the German Republic,and resident of Plau'eu, Saxon Germany, have invented a new and usefulEinprovemontin Devices for Fiilii'ig the Free Thread Ends of the Spoolsof Embroidery lrfachines, of which the following s specification.

in the winding of the small spools necessary for operating embroiderymachines fixing the thread end offers particular difficulties. It hasbeen t led repeatedly to OVQlQOl'IiQ these difficulties but the successhas not been satisfactory. it has been proposed, for instance, to causea tongue to take hold of the fastening windings of the spool after thedriving mechanism for the spool mandril has been caused to stop, and toshove the free thread end under a few of said windings so as to have itclamped fast thereby. The fastening windings suffer, of course, veryconsiderably by that procedure so that they can hardly be used'for theour broidery procedure, but are, practically, lost.

It has also been proposed to place a small hooked needle towards thespool body after the winding procedure proper has been finished, andthen let it rotate together with the spool so that the fasteningwindings having been made, the free thread-end is laid into the hook ofthe auxiliary needle and this latter is drawn out of the fasteningwindings together with the thread-end laid into it. This procedure, is,however, only little reliable, as the fastening windings cannot be woundfast enough owing to the auxiliary hook having been laid therebetween,whereby the risk is caused that they are stripped off the spool andentangle with each other previous to the entire consumption thereof.

In order to obviate these deficiencies the free end of the threadof thespool is, according to this invention, fixed in the way that a needlepreferably a circularly curved hook-needle can be passed through the fastoning convolutions of the spool after these convolutions have beenwound, whereafter the free thread-end is placed into the hook and,finally, this latter is drawn out of the fastening convolutions togetherwith the piece of thread placed into it. In this way the thread-end isconnected with the spool is a reliable manner so that the latter can notunwind while it is transported.

My invention is illustrated, by way of inple, in the accompanyingdrawing, in .ich Fiqure 1 is a front-view of those parts of the spoolingmachine as are necessary to understand fully the invention; Figures 2ant. 3 show the same parts, some of which are in other positions, andFigure a representation of the curved needle drawn to an enlarged scale.

The spooiing mandrel is shown to carry two spools a and a which havebeen wound on it one after the other. In the lefthand half is'shown theposition of the parts in that moment in which just the last windot theconvolutions f is wound around the spool (4.

hen the driving a is stopped means for the mandrel so as to cause thespools to come to a standstill for a moment. the needle 2' is so turr asto pass through the convolutions below the same, as shown in Figure 2..The first part of the needle is suitably curred, whereas the other partis straight and passes through the centro point of the ciu'vetl part,this point lying in the axis of the bolt 0? to whi h the needle isaiiixed. This bolt is rotatable in a hearing or sleeve 6, of which onlythe uppermost part is shown.

The needle having arrived in the position illustrated in Figure 2, thethread it which runs from the spool to the thread-guide Z) is laid intoa laterally open ear Z (Fig. 4) of the needle c by means of an auxiliarythread guiding member 9, whereafter the bolt (Z is turned in theopposite direction so as to cause it to withdraw the needle from thefastening convolutions and draw the thread under these convolutionswhereby it is secured in place.

The loop which the thread it forms on the other side of the fasteningconvolutions is cut open by a knife 70, and the now finished spool isshifted. along the mandrel by a shifting member 0 whereafter anotherspool is being wound.

The thread-piece running from one finished spool to the next finishedspool leaves the fastening convolutions below and by which it is neldfast spontaneously when the respective spool is shoved farther of anauxiliary shifting member (not shown) which is practically a member like0 and enters into the space between two consecutive spools (for instancea. and a shortly before the main shifting member 0 becomes active.Supposing, the auxiliary shifting member enters in the proper momentinto the space between the spools and c and shifts the spool a to theright the thread at will get out of the fastening convolutions f of thisspool, whereby the free thread-end is shifted to the right, the freethread-end m gets into the range of a pair of scissors arranged in knownmanner in front of the spools and cuts off said thread-end nearlycompletely leaving merely quite a short piece which cannot do anydamage.

I wish it to be understood that the needle 0 need not at any rate becircularly or otherwise curved at its free half: also an entirelystraight needle may be employed if suitably devised means for moving itthrough below the fastening convolutions are provided.

I claim:

1. A device for fixing the free thread-ends of the spools ofautomatically operating embroidery machines, comprising, in combination,a curved needlehaving a laterally open ear and being adapted to he movedthrough below the fastening convolutions of a spool and means for thusmoving said needle in one and the opposite direction.

2. A device for fixing the free thread-ends of the spools ofautomatically operating embroidery machines, comprising, in combination,with the spool mandrel and a spool thereon and the fasteningconvolutions of said spool, a needle, the working part of which iscurved circularly and which has a laterally open ear located on theinner side of the curvature and is adapted to be moved through belowsaid fastening convolutions,

and means for thus moving said needle in one and the opposite direction.

3. A device for fixing the free thread-ends of the spools ofautomatically operating embroidery machines, comprising, in combination,a circularly curved needle having a laterally open car on the inner sideof the curvature and being adapted to be moved through below thefastening convolutions of a spool, means for thus moving said needlein'one and the opposite direction, and means for severing oif thethread-part drawn through below the said convolutions on the returnmovement of the said needle.

4. A device for fixing the free thread-ends of the spools ofautomatically operating embroidery machines, comprising, in combination.a needle having a circularly curved oprating front part and a laterallyopen ear therein and being adapted to be moved through below thefastening convolutions of a spool, and means for thus moving said needlein one and the opposite direction.

A device for fixing the free thread-ends of the spools of automaticallyoperating embroidery machines, comprising, in combination with the spoolmandrel and a spool thereon and the fastening convolutions of saidspool, a needle having circularly curved operating front part and alaterally open ear therein and being adapted to be moved through belowthe fastening convolutions of a spool, means for thus moving said needlein one and the opposite direction, and means for serving off thethread-part drawn through below the said convolutions on the returnmovement of the said needle.

In testimony whereof I alfix my signature in presence of two witnesses.

RICHARD SEYFARTH.

lVitnesses M. GROEBER, H. THURBER.

